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For the Inventor, By the Inventor

Yokohama, Japan

Naruhiko Kasai

This inventor holds 80 USPTO granted patents and 5 published patent applications and 1 EPO patent, primarily in Display Technology (CPC class G09G3-36). Top assignees: Hitachi, Ltd., Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.. Active years: 1996-2015.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Naruhiko Kasai. Retrieved from https://idiyas.com/inventor/naruhiko-kasai

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 80 

% Patents Active = 80.0

 

Average Co-Inventor Count = 4.9

ph-index = 12

Forward Citations = 522(Granted Patents)

Forward Citations (Not Self Cited) = 468(Dec 10, 2025)


Inventors with similar research interests:

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Location History:

  • Fujisawa, JP (1996 - 2012)
  • Yokohama, JP (1999 - 2015)

Company Filing History:

goldMedal40 out of 42,731 
 
Hitachi, Ltd.
 patents
silverMedal25 out of 1,207 
 
Hitachi Displays, Ltd.
 patents
bronzeMedal24 out of 1,238 
 
Panasonic Liquid Crystal Display Co., Ltd.
 patents
4. 10 out of 5,795 
 
Japan Display Inc.
 patents
5. 3 out of 46 
 
Hitachi Video and Information System, Inc.
 patents
6. 2 out of 92,994 
 
Canon Kabushiki Kaisha
 patents
7. 2 out of 217 
 
Hitachi Device Engineering Co., Ltd.
 patents
8. 1 out of 13 
 
Hitachi Video and Information Systems, Inc.
 patents
9. 5 out of 834,513 
Other
 patents
where one patent can have more than one assignee

Years Active: 1996-2015

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Areas of Expertise:
Display Device
Liquid Crystal Display
Organic Electroluminescence
Image Processing
Tone Correction
Touch Panel
Self-Emission Display
Power Supply Circuit
Driving Method
Matrix Display
Pixel Deterioration
Multiple-Tone Display
80 patents (USPTO):Explore Patents
1. 9177504 - Image display device (2015-11-03),
2. 8957883 - Display device (2015-02-17),
3. 8816945 - Display apparatus (2014-08-26),
4. 8743155 - Circuit and driving method for correcting tone output of a pixel (2014-06-03),
5. 8674973 - Liquid crystal display device employing dot inversion drive method with reduced power consumption (2014-03-18),
6. 8674912 - Image display device (2014-03-18),
7. 8643594 - Display device (2014-02-04),
8. 8643574 - Imaging device (2014-02-04),
9. 8610646 - Organic electroluminescence display device (2013-12-17),
10. 8605069 - Image display device (2013-12-10),
11. 8605062 - Display device (2013-12-10),
12. 8537081 - Display apparatus and display control method (2013-09-17),
13. 8531489 - Display apparatus having matrix display elements (2013-09-10),
14. 8514153 - Imaging device and method of correction pixel deterioration thereof (2013-08-20),
15. 8477086 - Organic electroluminescence display (2013-07-02),

As an AI assistant specializing in innovations, inventions, inventors, patent attorneys, assignees, and patents, I will help you craft an article about inventor Naruhiko Kasai.

Title: Innovator Naruhiko Kasai: Revolutionizing Image Display Technology

Introduction: Naruhiko Kasai is a prolific inventor based in Yokohama, Japan, renowned for his groundbreaking work in image display device technology. With an impressive portfolio of 80 patents, Kasai has consistently pushed the boundaries of innovation in the field.

Latest Patents:

1. Image Display Device: Kasai's innovative image display device tackles the burning phenomenon by introducing a circuit that effectively compensates for display signal voltage without increasing circuit size. This advancement enhances the performance and longevity of display units.

2. Display Device: In his latest patent, Kasai introduces a display device equipped with a frame frequency conversion circuit and a timing control circuit. This technology enables the generation of multiple display areas with varying frame frequencies, offering a dynamic viewing experience.

Career Highlights: Kasai's career has been defined by his tenure at esteemed companies such as Hitachi, Ltd., and Hitachi Displays, Ltd. His contributions to these organizations have been instrumental in shaping the landscape of display technologies.

Collaborations: Throughout his career, Kasai has collaborated with industry experts such as Hajime Akimoto and Tsutomu Furuhashi. Together, they have leveraged their collective expertise to drive innovation and bring cutting-edge solutions to the market.

Conclusion: Naruhiko Kasai stands as a visionary inventor whose relentless pursuit of excellence has revolutionized image display technology. His patents and collaborations underscore his commitment to pushing the boundaries of innovation, making him a pioneer in the field.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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